Goodwill and Intangible Assets (Amortization Expense) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible asset amortization expense	$ 405.6	$ 412.2	$ 1,210.3	$ 1,191.9
IPR&D intangible asset impairment charges	0.0	15.5	29.5	87.5
Finite-lived intangible asset impairment charges	1.9	0.0	42.3	0.0
Total intangible asset amortization expense (including impairment charges)	$ 407.5	$ 427.7	$ 1,282.1	$ 1,279.4